<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区 -->
      <div class="avatar_box">
        <img src="../assets/imgs/admin.png" alt="" />
      </div>
      <!-- 登录表单区 -->
      <el-form
        :model="loginForm"
        ref="loginFormRef"
        :rules="loginFormRules"
        label-width="0px"
        class="login_form"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="el-icon-user-solid"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            type="password"
            prefix-icon="el-icon-lock"
          ></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetloginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //这是登录表单的数据对象
      loginForm: {
        username: 'admin',
        password: '123456',
      },
      //表单验证规则
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名称', trigger: 'blur' }
          // { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          {
            min: 6,
            max: 15,
            message: '长度在 6 到 15 个字符',
            trigger: 'blur',
          }
        ]
      }
    }
  },
  methods: {
    //表单重置按钮函数
    resetloginForm() {
      this.$refs.loginFormRef.resetFields()
    },
    //登录预验证
    login() {
      this.$refs.loginFormRef.validate(async (valid) => {
        //是否发起登录请求
        if (!valid) return
        const { data: result } = await this.$http.post('login', this.loginForm)
        if (result.meta.status !== 200) return this.$message.error('登录失败！')
        this.$message.success('登录成功！')
        //登录成功后，将token保存到客户端的sessionStorage中，记录下用户登录状态
        window.sessionStorage.setItem('token', result.data.token)
        //页面跳转到home
        this.$router.push('/home')
      })
    },
  },
}
</script>

<style lang="less" scoped>
.login_container {
  height: 100%;
  background-color: #2b4b6b;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 5px;
  position: relative;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.avatar_box {
  height: 130px;
  width: 130px;
  background-color: #fff;
  border: 2px solid #eee;
  border-radius: 50%;
  padding: 8px;
  box-shadow: 0 0 10px #eee;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  img {
    height: 100%;
    height: 100%;
    background-color: #eee;
    border-radius: 50%;
  }
}
.login_form {
  position: relative;
  top: 100px;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: center;
}
</style>